noun, plural alulae /ˈælyəˌli/ [al-yuh-lee] Show IPA .
1. Also called bastard wing, spurious wing.
the group of three to six small, rather stiff feathers growing on the first digit, pollex, or thumb of a bird's wing.
a membranous lobe at the base of each wing of a dipterous insect.
Origin: 1765–75; Related forms
equivalent to Latin āl
) wing + -ula -ule